Onan 3.6kw 120vac generator. [RE-wrenches]

[matthew tritt]

Wow! I had no idea the ProSine was anywhere near that efficient! One hears
such non-flattering things about them usually.

Matt
----- Original Message -----
From: "Joe Schwartz, Home Power" <joe.schwartz at homepower.com>
To: <RE-wrenches at topica.com>
Sent: Tuesday, September 17, 2002 5:03 PM
Subject: RE: Onan 3.6kw 120vac generator. [RE-wrenches]


> Hey Hugh,
>
> >At 3:09 pm -0700 17/9/02, jberdner at sma-america.com wrote:
> >>Matt:
> >>
> >>While low cost generators may have bad power factor but you also have to
> >>look at the power factor of the inverter when charging.
> >
> >this statement puzzles me.  Power factor is determined by the load,
> >and not the generator (no?).
>
> Exactly!
>
> >
> >>  In my
> >>experience the US inverter chargers present a low power factor load to
> >>the generator.  This means the inverter / charger is asking for current
> >>at the wrong time (out of phase with the voltage).  Low power factor
> >>loads make it very difficult for the lower cost generators to deliver
> >>significant power through the charger to the battery.
> >
> >When I measure the power factor of a Trace SW loading a generator it
> >is pretty near to 1, but still it is clear that something is going
> >on, because the voltage is pulled down and the engine is working
> >hard.  I wonder if my power analyser really takes account of the
> >waveform distortion between input voltage and the current drawn.
> >They are in phase OK, but the shape of the current wave is weird.
> >Not all on the peak like a DR, but more flattened out.
>
> Using a Fluke 43B Power Quality Analyzer, with the SW in charge mode,
> I see power factor values between 0.75 to 0.85 depending on the
> charge rate. The power factor further degrades when the batteries are
> close to full, and the charge rate is really low.
>
> The AC chargers in the PROsine series inverters have power factor
> values between 0.98 to 1.0 - stylin'!
>
> Joe
> --
>
> Joe Schwartz - CEO and Technical Editor
> Home Power magazine
> joe.schwartz at homepower.com
> www.homepower.com
>
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